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Table 1 Risk factors contributing to Staphylococcus aureus mastitis on the example farm. Figures in brackets refer to the weighting and ranking of the risk factors

From: HACCP-based quality risk management approach to udder health problems on dairy farms

Deficiencies in the milking machine function (1)
High teat end callosity scores in the herd (2)
Contaminated hands of milkers, bedding material, flies (3)
Previous udder infections with Staphylococcus aureus or (4)
Streptococcus uberis  
Poor milking method and hygiene (5)
Poor culling policy regarding problem cows (6)
Age of cows (7)